(N) A SPAM message that has been posted in a realtime chatroom by someone (usually a guest to that chatroom) that advertises another chatroom.
1. "I heard that wolfgurl325 got banned from #NarutoWorldRP for posting a spamvertisement."
Spam emails, privet messages, notes, comments that people recive on/in their accounts.
"I got one today. Some kind of spamvertisement asking me to go some site"